The designers of a new pedestrian crossing over Auckland’s busy Tamaki Drive didn’t want any old bridge – they wanted it to make a statement.
The bridge’s concrete beams were to be produced at Auckland company Wilson Precast. Incorporating the artist’s design into the formed face of the precast beams was a key challenge for the project.
It would also require Jackson to deploy the full extent of its comprehensive CNC machining capability to meet the scale of the required tooling. In fact, the unprecedented size of the project resulted in the largest flexible form-liner ever manufactured in New Zealand.
To construct the form-liner we created a master mould, made from our proprietary tooling board CaroC. The job required the use of a 3D model of the artwork and a computer-aided router to machine the design.
The final pattern was developed using a rubber form-liner we then fabricated from the master mould. This saw rubber poured into the master to create a flexible form-liner that could be added to the curved beam formwork, prior to the addition of reinforcing steel and concrete at Wilson Precast’s yard.
The bridge’s landmark features were recognised by three awards: NZIA Auckland Architecture Award – Public Architecture 2013; The Chicago Athenaeum and European Centre International Architecture Award 2014; and the SCNZ Award for Excellence in Steel Construction 2015.
This project had an incredibly short timeframe as there was only a short installation window available during the xmas period when the train lines had to be shut down for craning in of the three 90 tonne sections.
Today (14 April 2015), we pulled a “TSL” lighting production unit from our test tank for a visual inspection –The look might be appalling…
The good news however – TSL is still in perfect working condition, watertight and electrically safe.
Jackson Electrical rigorously tests all products prior to market, and continues to develop and test these products over their lifetime based on comments from industry and customer feedback.
In this case, a test rig cycles power on the unit periodically. An interesting issue with waterproof lighting is the fluctuating temperature – and subsequently the fluctuating pressure which in turn makes any waterproof light fitting a pump, trying to fill itself with water. The rig also periodically electrically tests and logs the state of resistance, bulb condition and so on. You can see in the unit shown above the base is molded in clear plastic to enable a visual check of the fitting base without disassembling.
We are pleased to find no issue in this longer term test. The units had been tested underwater for 100+ hours prior to being marketed – however there is no replacement for many punishing hours in the worst case scenario to prove to customers that the product is robust.
Lastly, the supposedly temporary (!) test rig. This was built for ‘test-to-failure’ of the TSL product. However it just wont happen. It is looking more and more like we are stuck with this eyesore forever…
In recent months Jackson Electrical Industries have moved their hire operation to a larger premises at 6 Selwyn Street, Onehunga. This move was required due to another soon to be arriving – 5-axis 10m x 4m x 2m machining center from Italy. This required doubling the floorspace of our already extensive machining, tool making and concrete moulding division. To give scale to current projects, Jackson is now stocking onsite multiple-ton batches of concrete moulding rubber. We can help you with your project and have the experience for small and large scale works.
We expect this extra capacity to be in operation by late July this year. This will have a dramatic effect on shortening of customer lead times, and has been specified to the highest possible accuracy available from a machine of this type, further reducing post finishing work required for your project.
Get in contact with firstname.lastname@example.org to discuss how we can help with your project, from small run widgets, to 100m long composite structures and anything in between.
Jackson had to truly step up to the plate in order to meet the tooling scale required for the Parnell Foot Bridge. Providing unprecedented large scale CNC machining services, the largest NZ manufactured flexible form liner to date was produced.
Incorporating an artist’s design into the formed face of the precast beams was a key challenge for the project; this aspect of the construction was done in collaboration with Wilson Precast. The pattern was formed using a rubber form liner fabricated by Jackson Electrical. To construct the form liner Jackson Electrical created a master negative mould in its proprietary tooling board CaroC, using a 3D model of the art work and a computer aided router. Rubber was then poured into the master negative to create a flexible form liner that could be added to the curved beam form work, prior to the addition of reinforcing steel and concrete at Wilson’s yard.